Intermediate Coupling Theory of Electronic Ferroelectricity
Strongly Correlated Electrons
2009-11-10 v2
Abstract
We calculate the quantum phase diagram of an extended Falicov-Kimball model for one and two-dimensional systems in the intermediate coupling regime. Even though some features of the phase diagram are obtained analytically, the main results are calculated with a constrained path Monte Carlo technique. We find that this regime is dominated by a Bose-Einstein condensation of excitons with a built-in electric polarization. The inclusion of a finite hybridization between the bands removes the condensate but reinforces the ferroelectricity.
Cite
@article{arxiv.cond-mat/0308329,
title = {Intermediate Coupling Theory of Electronic Ferroelectricity},
author = {C. D. Batista and J. E. Gubernatis and J. Bonča and H. Q. Lin},
journal= {arXiv preprint arXiv:cond-mat/0308329},
year = {2009}
}